Heating apparatus.



G. W. FRANZHEIM.

HEATING APPARATUS.

APPLICATION FILED JULY 9. 1914.

Patented May 18, 1915.

WITNESSES GEORGE W. FRANZl-IEIM, 0F PITTSBURGH, PENNSYLVANIA.

HEATING APPARATUS.

Specification of Letters Patent.

Patented May 18, 1915,

Application filed July 9, 1914. Serial No. 850,012.

To all whom it may concern Be it known that I, GEORGE 1V. FRANZ- HEIM, a citizen of the United States of America, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Heating Apparatus, of which the following is a specification, reference being had therein to, the accompanying drawing.

This invention relates to a furnace for heating water or generating steam and for consuming smoke during the water heating operation, and has for its principal objects the provision of a heating furnace wherein a combustion chamber having the down draft principle of combustion is provided with a direct passage for the products of combustion thereby facilitating the combustion of the fuel the provision of a water heating element which offers a minimum of resistance to the passage of the gases or products of combustion and which may absorb a maximum quantity of heat from the gases passing them; the provision of an arrangement of water heating elements with respect to the [ire box whereby the high temperature of the gases contacting with the water heating elements will cause the soot deposits which accumulate thereon to. scale ofl by virture of an increased expanding and contracting action; the provision of a construction wherein the parts are readily assembled and repaired, and the provision of a construction that is simple and strong and durable as well as embodying a high degree of efiiciency.

With the foregoing and other objects in view, the invention consists of the novel con-r struction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and; modifications can be resorted to which come within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the general viewstz-ie Figure 1 1s a longitudinal sectional View of a furnace in accordance with this invention.

Figure 2 is an end elevation partly in vertical section, and

Figure 3 is a transverse sectional view.

Referring to the drawings, the furnace consists of a series of vertically disposed abutting units 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14: which are supported upon a base formed of a pair of channel irons 15 and 16.

Each of the units 5 to 18 consists of a pair of vertically disposed hollow legs 17 connected together at their top by a horizontally disposed hollow leg 18, and the side walls of each horizontal leg 18 is offset as at 19 and provided centrally with a circular opening 20. The openings 20 of the horizontal legs 18 of the units 5 to 18 aline with each other.

The legs 17 of the units 5, 6, 7 are connected together by horizontally disposed hollow integral grate bars 21.

The vertical legs 17 of the unit 8 are connected together by a horizontally disposed hollow integral grate bar 22, which has formed integral therewith a vertically disposed hollow plate 23, the latter being also integral with the legs 17 of the unit 8 and with the bottom of the horizontal leg 18 of the unit 8.

The grate bars 21 and 22 are positioned intermediate the ends of the legs 17 of the units 5 to 8 and in connection with the legs 17 18 and plate 22 provide an upper fire box indicated by the reference character 24.

The units 5 to 8 are arranged in abutting engagement and are interposed between the units 4 and 9, the former being arranged at the front of the furnace and consisting of a vertically disposed hollow rectangular casting formed with an opening 25, which constitutes a fire box opening and which is closed through the medium of a door 26. Supported between the channel bars or irons 15 and 16 are horizontally disposed grate bars; 27, which are arranged at the bottoms of the legs 17 of the units 5 to 8 and provide in connection with the legs 17 ofthe units 5 to 8, a lower fire box 28. The unit 4: below the opening 25 is formed, with an opening 29, which constitutes an entrance to the lower fire box 28, and said opening 29 is closed by a door 30.

The vertical legs 17 ofthe units 9 to 13 are connected together at their lower ends by for the products of combustion. i The vertical legs 17 of the units'5 to, 13

at their lower ends are enlarged as at 35 and extending'through the said enlarged portions are tie bolts 36, these latter also extend through the units 4 and 14. Y

Extending through the units 4 and 14 at the top thereof and through the openings 20 formed by the units 5 to 13 is a tie bolt 37, which carries on each end a clamping member 38, and the said members 38 abut against and extend into the units 4 and 14. The tie bolts 36 carry on each end clamping members 39 which abut against and extend into the units 4 and 14. The furnace is provided with a suitable water inlet, as Well as a suitable hot water outlet. 8

The fire in the lower firebox 28 is employed for consuming the smoke as it passes down between the grate bars 21 and 22, and the fire in the box 24 is utilized primarily for heating the water which is arranged in the water space formed by the hollow units 4 to 14. i

The tubes 32 are so spaced as to not interfere with the passage of the heating units from the fire boxes 24-28. g

The advantages incident to the design and relative arrangement of the various ele ments constituting the combined furnace and heating apparatus hereinafter appears.

The provision of a fire box surrounded on all sides by hollow walls containing the water to be heated together with hollow water tube grate bars communicating with the hollow walls of the fire box, greatly increases the heating capacity of the apparatus, and the use of the downdraft grate in combination with a lower up draft grate insures almost perfect combustion of the fuel as well as of the smoke resulting from such combustion.

The heating chamber which consists of V water filled walls provided with a battery of vertical water tubes communicating with the top and bottom walls, located behind the fire box so that the lower ends of the'tubes are behind the smoke passage of the furnace, while the smoke exhaust is placed-in the comprising a down draft grate,

the water tubes first, and as the gases pass diagonally across the heating chamber from the smoke passage in the furnace to the exit near the top, they are buffeted by the vertical tubes as they pass them transversely thereby causing a greater number of heated gas particles to come in contact with the vertical tubes than would be the case if the gases passed along parallel with the tubes.

The gases have a direct passage from the firebox to the exhaust flue thereby insuring an unimpeded draft, a condition not found in a furnace having a return flue and a condition necessary for the successful opera- 1 tion of a down draft combustion grate. Y

The water tubes beingvertically disposed and in contact with extremely hot gases are continually contracting and expanding, such action causing the soot deposits thereon to scale off and fall from the tubes insuring at a all time water tubes free from soot, thus obviating the necessity of frequent cleaning and affording a better heat absorbing unit.

What I claim is 1. A heating apparatus having at its front end a furnace portion, and atits rear end a boiler portion, the furnace portion a lower up draft grate the rear of draft grate beneath the down and an outlet for the gases at and between the grates; the boiler portion including a water heater or boiler consisting of a heating chamber provided with hollow top and bottom walls for containing water, a battery of vertical water tubes connecting the bottom wall of the heating chamber with the'top wall, and an exhaust for the gases through the rear wall of the heating chamber adjacent the top thereof arranged so the gases from the furnace will diagonally traverse the heating chamber from the bottom thereof toward the top and transversely engage the vertical water tubes,

the said bottom wall lying at a level adjacent that of the lower grate.

2. A heating apparatus having at its front end a furnace portion and at its rear end a boiler portion, the furnace portion comprising a down draft grate, draft grate, beneath the down and an outlet forthe gases at' the rear of and between the grates; the boiler portion including a water heater or boiler consisting of a heating chamber provided with hollow top and bottom walls for containing water,'a battery of vertical watertubes connecting the bottom wall of the heating chamber at a point below the down draft grate, with the to wall of the heating chamber above the own draft grate and an a lower up draft grate exhaust for the gases through the rear Wall In testimony whereof, I afiix my signaof the heating chamber adjacent the top ture, in the presence of two Witnesses.

Wall of the heating chamber arranged so GEO. W. FRANZHEIM. the gases from the furnace will diagonally Witnesses:

traverse the heating chamber and trans- NELLIE GOLDSTEIN,

versely engage the vertical Water tubes. A. D. KAUFMANN.

C'opies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

